aphid colony is breeding on plant stem of lathyrus pratensis. green aphids and yellow flower

agriculture aphid aphididae aphidina aphidoidea aphids aphis attack backdrop background birth bite breeding bug close colony common damage disease environment farming feeding flower garden gardening generation green insect invasion kind lathyrus leaves leguminosae new nutriment parasite pasture pest plant pratensis sap stalk stem suck suction vermin vicia weed white yellow